INTERNAL SERVER ERROR (WIERD???)

Hello Friends,
Kindly help.
I am working on an script which is working with our email program of
our company.
Recently some changes were made to the script and it started giving he
nasty " 500 INTERNAL SERVER ERROR".
The Apache error logs give:-
Premature end of script headers.

Now, the script does execute and the email is sent but the webpage
gives the error. Also, this error comes up only sometimes but not
everytime we run the script in identical conditions, say one in three
times. Sometimes when I go back to the previous page and again press
the submit button , it goes properly. All the file permissions are
proper, the /usr/bin/perl -w is right, Content type is correct, pert
-cwT , all are checked , I mean , all the usual answers to the problem
are checked and they are fine. If it were a syntax error, or some
header problem , it would never have run , but it is running well for
the past 7 years. The changes that I made to it were nominal and they
do not affect the output.

Also, I dont know how to step run the script from a web browser. Also,
I dont know where to look for the bug since it does run properly
SOMETIMES.

Please help.

Regards,
Vivek. J. Joshi.

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